<template>
  <div class="login">
    <section class="form_container">
      <div class="manage_tip">
        <span class="title">在线后台管理系统</span>
        <el-form :model="loginUser" :rules="rules" ref="loginForm"
        label-width="80px" class="loginForm">
        
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="loginUser.email" placeholder="请输入邮箱"></el-input>
          </el-form-item>
          <el-form-item label="密码" prop="password">
            <el-input type="password" v-model="loginUser.password" placeholder="请输入密码"></el-input>
          </el-form-item>

          <el-form-item>
            <el-button type="primary" class="submit_btn" @click="submitForm('loginForm')">
              登录
            </el-button>
          </el-form-item>

          <div class="tiparea">
          <p>还没有账号？现在<router-link to='/register'>注册</router-link></p>  
        </div> 
        </el-form>   
      </div>
    </section>
  </div>
</template>

<script>
import jwt_decode from 'jwt-decode'
import { decode } from 'punycode';
export default {
  name: 'login',
  components: {},
  data () {
    return {
      loginUser: {
        email: "",
        password: ""
      },
      rules: {
        email: [
          {
            type: 'email',
            required: true,
            message: '邮箱格式不正确',
            trigger: 'blur'
          }
        ],
        password: [
          {
            required: true,
            message: '密码不能为空',
            trigger: 'blur'
          },
          {
            min: 6,
            max: 30,
            message: '长度在6到30位之间',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  methods: {
    submitForm (formName) {
      this.$refs[formName].validate(valid => {
        if (valid) {
          this.$axios
          .post('/api/users/login', this.loginUser)
          .then(res => {
            
            //token
            const { token } = res.data
            //存到本地缓存
            localStorage.setItem('eleToken', token)

            //解析token
            const decoded = jwt_decode(token)
            // console.log(decoded)

            //token存储到vuex中
            this.$store.dispatch('setAuthenticated', !this.isEmpty(decoded))
            this.$store.dispatch('setUser', decoded)

            this.$router.push('/index')
          })

          
        } else {
          console.log('error submit!')
          return false
        }
      })
    },
    isEmpty (value) {
      return (
        value === undefined ||
        value ===null ||
        (typeof value === 'object' && Object.keys(value).length === 0) ||
        (typeof value === 'string' && value.trim().length === 0)
      )
    }
  }
}
</script>

<style scoped>
.login {
  position: relative;
  width: 100%;
  height: 100%;
  background: url(../assets/bg.jpg) no-repeat center center;
  background-size: 100% 100%;
}
.form_container {
  width: 370px;
  height: 210px;
  position: absolute;
  top: 10%;
  left: 50%;
  margin-left: -185px; /*此处左右居中了*/
  padding: 25px;
  border-radius: 5px;
  text-align: center;
}
.form_container .manage_tip .title {
  font-family: 'Microsoft YaHei';
  font-weight: bold;
  font-size: 26px;
  color: #fff;
}

.loginForm {
  margin-top: 20px;
  background-color: #fff;
  padding: 20px 40px 20px 20px;
  border-radius: 5px;
  box-shadow: 0px 5px 10px #cccc;
}
.submit_btn {
  width: 100%;
}
.tiparea {
  text-align: right;
  font-size: 12px;
  color: #333;
}
.tiparea p a {
  color: #409eff
}
</style>

